CompTIA CompTIA Certifications N10-008 Questions & Answers

• Question 881:

  A network administrator is designing a wireless network. The administrator must ensure a rented office space has a sufficient signal. Reducing exposure to the wireless network is important, but it is secondary to the primary objective. Which of the following would MOST likely facilitate the correct accessibility to the Wi-Fi network?

  A. Polarization

  B. Channel utilization

  C. Channel bonding

  D. Antenna type

  E. MU-MIMO

  Correct Answer: D

  The MOST likely factor to ensure the correct accessibility to the Wi-Fi network in the scenario described is the antenna type, as it affects the coverage, signal strength, and performance of a wireless network. The other options listed (polarization, channel utilization, channel bonding, MU-MIMO) may improve the performance of a wireless network, but are not the primary factor in ensuring the correct accessibility in this scenario.

• Question 882:

  A network administrator is given the network 80.87.78.0/26 for specific device assignments. Which of the following describes this network?

  A. 80.87.78 0 - 80.87.78.14

  B. 80.87.78 0 - 80.87.78.110

  C. 80.87.78 1 - 80.87.78.62

  D. 80.87.78.1 - 80.87.78.158

  Correct Answer: C

  The network 80.87.78.0/26 is a Class A network with a subnet mask of /26, which means that it contains 26 bits of network information and 6 bits of host information. The range of valid host addresses for this network is 80.87.78.1 to

  80.87.78.62. Any addresses outside of this range are reserved for special purposes or are not used.

• Question 883:

  Which of the following would be BEST to use to detect a MAC spoofing attack?

  A. Internet Control Message Protocol

  B. Reverse Address Resolution Protocol

  C. Dynamic Host Configuration Protocol

  D. Internet Message Access Protocol

  Correct Answer: B

  Reverse Address Resolution Protocol . Can be used to ask what a machine's IP address is based on it's MAC address. If the adress has been spoofed it will obviously show a different IP than the one it is expecting to see

• Question 884:

  A systems administrator needs to improve WiFi performance in a densely populated office tower and use the latest standard. There is a mix of devices that use 2.4 GHz and 5 GHz. Which of the following should the systems administrator select to meet this requirement?

  A. 802.11ac

  B. 802.11ax

  C. 802.11g

  D. 802.11n

  Correct Answer: B

  Wi-Fi 6 (802.11ax) can now divide a wireless channel into a large number of subchannels. Each of these subchannels can carry data intended for a different device. This is achieved throug something called Orthogonal Frequency Division Multiple Access, or OFDMA. The Wi-Fi access point can talk to more devices at once. The new riderless standard also has improved MIMO - Multiple In/Multiple Out. This involves multiple antennas, which let the access point talk to multiple devices at once. With Wi-Fi 5, the access point could talk to devices at the same time, but those devices couldn't respond at the same time. Wi-Fi 6 has an improved version of multi-user or MU-MIMO that lets devices respond to the wireless access point at the same time

• Question 885:

  Which of the following would be BEST to install to find and block any malicious users within a network?

  A. IDS

  B. IPS

  C. SCADA

  D. ICS

  Correct Answer: B

  IPS (Intrusion Prevention System) has block actions, where as IDS (Intrusion Detection System) only detects and alerts, but doesn't block

• Question 886:

  A network technician has determined the cause of a network disruption. Which of the following is the NEXT step for the technician to perform?

  A. Validate the findings in a top-to-bottom approach

  B. Duplicate the issue, if possible

  C. Establish a plan of action to resolve the issue

  D. Document the findings and actions

  Correct Answer: C

  Once the network technician has determined the cause of a network disruption, the next step would be to establish a plan of action to resolve the issue. This plan should detail the steps that need to be taken to fix the problem and restore normal network operations. The plan should take into consideration the scope of the problem, the resources available, and the potential impact on the business.

• Question 887:

  A network administrator walks into a datacenter and notices an unknown person is following closely. The administrator stops and directs the person to the security desk. Which of the following attacks did the network administrator prevent?

  A. Evil twin

  B. Tailgating

  C. Piggybacking

  D. Shoulder surfing

  Correct Answer: B

• Question 888:

  Wireless users are reporting intermittent internet connectivity. Connectivity is restored when the users disconnect and reconnect, utilizing the web authentication process each time. The network administrator can see the devices connected to the APs at all times. Which of the following steps will MOST likely determine the cause of the issue?

  A. Verify the session time-out configuration on the captive portal settings

  B. Check for encryption protocol mismatch on the client's wireless settings

  C. Confirm that a valid passphrase is being used during the web authentication

  D. Investigate for a client's disassociation caused by an evil twin AP

  Correct Answer: A

• Question 889:

  A technician receives feedback that some users are experiencing high amounts of jitter while using the wireless network. While troubleshooting the network, the technician uses the ping command with the IP address of the default gateway and verifies large variations in latency. The technician thinks the issue may be interference from other networks and non-802.11 devices. Which of the following tools should the technician use to troubleshoot the issue?

  A. NetFlow analyzer

  B. Bandwidth analyzer

  C. Protocol analyzer

  D. Spectrum analyzer

  Correct Answer: D

  A spectrum analyzer is a tool that focuses on the physical layer, which will vary based on the type of analyzer. Although vendors make these analyzers for both audio and optical signals, in most cases spectrum analyzers are used to analyze wireless or radio frequency signals. Spectrum analyzers are primarily used to identify and measure the strength of radio signals that are present in the area. They can visually display these signals by frequency on the device. These devices are used to locate sources of interference that may impact the operation of a wireless network.

• Question 890:

  A network is experiencing a number of CRC errors during normal network communication. At which of the following layers of the OSI model will the administrator MOST likely start to troubleshoot?

  A. Layer 1

  B. Layer 2

  C. Layer 3

  D. Layer 4

  E. Layer 5

  F. Layer 6

  G. Layer 7

  Correct Answer: A

  CRC (Cyclic Redundancy Check) errors are often indicative of problems at the physical layer of communication because they often result from issues like interference, signal attenuation, or poor-quality cables. The physical layer corresponds to Layer 1 of the OSI model.